package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.UserNotLoginException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    @Override
    public User login(UserLoginDTO dto) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", dto.getCode());
        map.put("grant_type", "authorization_code");
        String result = HttpClientUtil.doGet("https://api.weixin.qq.com/sns/jscode2session", map);
        JSONObject jsonObject = JSON.parseObject(result);
        //微信用户的唯一标识
        String openid = jsonObject.getString("openid");

        if (openid == null) {
            throw new UserNotLoginException(MessageConstant.USER_NOT_LOGIN);
        }

        User user = userMapper.getByOpenid(openid);

        //如果当前用户是第一次登录则保存用户信息到user表中
        if (user == null) {
            user = User.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }
        return user;
    }
}

















